EP1008016B1 - Dispositif d'alignement - Google Patents

Dispositif d'alignement Download PDF

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Publication number
EP1008016B1
EP1008016B1 EP97945780A EP97945780A EP1008016B1 EP 1008016 B1 EP1008016 B1 EP 1008016B1 EP 97945780 A EP97945780 A EP 97945780A EP 97945780 A EP97945780 A EP 97945780A EP 1008016 B1 EP1008016 B1 EP 1008016B1
Authority
EP
European Patent Office
Prior art keywords
transport
sheet
aligning
conveying direction
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97945780A
Other languages
German (de)
English (en)
Other versions
EP1008016A1 (fr
Inventor
Peter Thiemann
Otto Olbrich
Stefan Hajdukiewicz
Georg BÖHMER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP1008016A1 publication Critical patent/EP1008016A1/fr
Application granted granted Critical
Publication of EP1008016B1 publication Critical patent/EP1008016B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/004—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet
    • B65H9/006—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet the stop being formed by forwarding means in stand-by
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/10—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to incorrect side register
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
    • G03G15/6567—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for deskewing or aligning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/144—Roller pairs with relative movement of the rollers to / from each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/15—Roller assembly, particular roller arrangement
    • B65H2404/152—Arrangement of roller on a movable frame
    • B65H2404/1523—Arrangement of roller on a movable frame moving in parallel to its axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B65H2511/514—Particular portion of element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/41—Photoelectric detectors
    • B65H2553/412—Photoelectric detectors in barrier arrangements, i.e. emitter facing a receptor element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/41—Photoelectric detectors
    • B65H2553/416—Array arrangement, i.e. row of emitters or detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1315—Edges side edges, i.e. regarded in context of transport
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00556—Control of copy medium feeding
    • G03G2215/00561—Aligning or deskewing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00721—Detection of physical properties of sheet position

Definitions

  • the invention relates to an alignment device, in particular for a single sheet printer or copier, for alignment of a single sheet of a record carrier, with a Sensor device that detects the side edge of the sheet to to determine its position relative to a target pressure position with a traversable transverse to the transport direction of the sheet Transport device with which the sheet held by it in Dependence on the determined position in the target pressure position can be aligned and the two facing each other arranged, in a transverse to the direction of transport running contact line touching transport units has, the line of contact a stop for the front edge of the record carrier, and with one that Sheet of the feeding device feeding the transport device, the sheet in the transport position before being picked up by the Conveying units so far that the sheet between the feed device and the transport device bulges and aligns with the line of contact.
  • the for Printing or copying a single sheet of each Record carrier for example a single sheet Paper that is fed often has the problem that the Recording media at an angle or offset in the single sheet printer or copier is pulled.
  • the oblique or offset recording of the recording medium takes this a position that deviates from a target pressure position in which the record carrier can be printed correctly. Because proper printing on the record carrier only is possible in the target printing position, in particular can be pre-printed Forms or record carriers that are already with Color are printed and applied to the subsequent colors should no longer be printed correctly.
  • US-A-4 805 892 describes a device in US Pat a printer with a sheet based on the target print position is offset transversely to the direction of transport can be.
  • the device is from a feeder and one downstream of this seen in the direction of transport Transport device formed that is transverse to the direction of transport can be moved.
  • Transport device formed that is transverse to the direction of transport can be moved.
  • During the transport of the Sheet becomes the feeder with a higher conveying speed operated as the transport device, so that a loop forms between the two devices, which a movement of the transport device transversely to Direction of transport allows without that to be aligned Sheet is damaged.
  • To align the sheet accordingly a previously determined offset that the to be aligned Sheet transporting device transversely to Transport direction moved.
  • EP-A-0 658 503 describes an alignment device for Copiers with which one with respect to the direction of transport sheet drawn in at an angle parallel to the transport direction can be aligned.
  • the alignment device is off two driven roller pairs formed on a common Line are arranged transversely to the direction of transport and each capture an edge area of the sheet to be aligned.
  • the two pairs of roles with different Conveyor speeds operated so that the one edge area of the sheet compared to the other marginal area of the sheet is delayed or accelerated.
  • DE 32 23 048 C2 is one Alignment device for copiers known in which the Position of individually fed sheets of a record carrier before printing with a traversable transverse to the transport direction Transport device can be changed.
  • this known alignment device is the sheet first aligned parallel to the transport direction. For this the across, i.e. approximately perpendicular to the direction of transport Transport gap of the transport device closed so that there is a line of contact between the transport units formed. This line of contact between the transport units forms the stop for the front edge of the 3lattes.
  • a record carrier sheet is in the copier it is inserted by means of the transport device upstream feeder retracted and in the direction promoted the transport device. The feeder only ends the transport process when the sheet is between the feeding device and the transport device bulges.
  • the arched record carrier sheet stands under tension and lies evenly with its front edge to the line of contact between the transport units of the Transport device on. Then the sheet of the Transport device detected and conveyed into the copier.
  • a sensor device detects during this transport process the side edge of the sheet and determines its position transverse to the direction of transport and relative to the target pressure position. Corresponds to the determined position across the transport direction not the target pressure position, the one holding the sheet Transport device stopped and so far across the transport direction move until the position of the sheet of the target pressure position equivalent. Then the transport process continued.
  • the distance between the feed device and the transport device downstream conveyor that the sheet in the Copier transported be larger than the maximum possible Length of a single sheet. This is the only way to ensure that neither the feeder nor the conveyor hold the sheet while it is off the transport device is aligned transversely to the transport direction. Otherwise the sheet will be damaged during alignment. consequently the length of the alignment device depends on the maximum leaf length and is designed to be large. At the same time, shorter leaves that are less than half as thick are long like the sheets of maximum length by the alignment device not be transported since the surrender such a short sheet from the feeder the transport device or from this to the conveyor device fails.
  • the feeder gives what is to be aligned Sheet free after it from the transport device has been recorded. This ensures in a simple manner that the sheet is aligned transversely to the transport direction during the alignment is only held by the transport device. Furthermore, in the structural arrangement of the feeder to the transport device no consideration of the actual sheet length can be taken so that on the one hand Sheets of different lengths can be aligned and on the other hand the distance of the feed device to the transport device can be kept low, resulting in a small overall length for the alignment device is possible.
  • the feeder has two transverse to the transport direction of the sheet Conveyor units. At least one of the two funding units is between the transport position in which it is at the other Delivery unit is applied, and the open operating position movable in which it is at a distance from the other conveyor unit is held.
  • Suitable conveyor units are, for example rotatably mounted conveyor rollers, at least one of which is driven. Furthermore, the use of conveyor belts or tractor units possible.
  • At least one clamping element is that the movable conveyor unit in the transport position biases. Furthermore, at least on the feed device an actuating unit is provided which the movable conveyor unit against the force of the clamping element in the open operating position emotional. This ensures that the Feeder is ready for transport at any time and only while aligning the blade in the open operating position located.
  • the alignment device to provide a tensioning device which the transport device, before grasping the sheet, in a starting position across stops in the direction of transport in which the transport device is arranged approximately in the center of the transport path, along which the sheet is fed through the alignment device becomes.
  • the alignment device is ensured by the clamping device that the transport device before the recording medium detected, is in a defined starting position.
  • the transport device must be used transversely when moving to the transport device against the force of the clamping device be moved so that it is mechanically clamped. Thereby a particularly high positioning accuracy is achieved.
  • Hydraulic fixtures are suitable among others or mechanical spring elements, each on the two End faces of the transport device arranged on the frame the alignment device are attached.
  • the sensor device preferably has a first edge sensor, seen in the direction of transport, in front of the transport device is arranged.
  • This first edge sensor detects the position of the side edge of the sheet to the target pressure position Start to align the sheet. It is also an advantage if the sensor device is in the transport direction seen after the transport device arranged second Edge sensor has the location of the side edge of the sheet determined only when the transport device the sheet of Transfer location of the single sheet printer or copier supplies. This makes it possible to use the first edge sensor the position of the side edge of the sheet is constantly increasing monitor and the transport device during the process continuously readjust.
  • a first and second edge sensors it is possible not only the Determine sheet offset, but also by comparison that determined by the two edge sensors simultaneously Location values to determine whether the record carrier is drawn in at an angle. Are particularly suitable as edge sensors simple light barriers but also light sensitive Arrangements like CCD arrays.
  • the transport device is preferably by means of a first drive transverse to the transport direction of the record carrier method.
  • a first drive especially servo drives, since they are controlled very precisely can be.
  • Stepper motors are also used as drives for the transport device proposed as this by counting of the individual control pulses positioned very precisely can be and at the same time by counting the individual Control pulses determined the position of the transport device can be.
  • the first transport unit of the transport device is one transport roller extending transversely to the transport direction. At least one is pre-tensioned as the second transport unit back pressure roller resting on the transport roller used. Both the transport roller and the counter pressure roller can be formed with an elastic coating be so that the sheet can be held securely.
  • the transport takes place by means of a second drive that moves the transport roller.
  • a drive a servo drive or is also suitable here a stepper motor.
  • tractor units can be used as transport units So-called tractor units are used, the record carrier using conveyor belts in the alignment device move in.
  • FIG 1 is a schematic representation of an embodiment an alignment device 10 shown for alignment of a single sheet 12 of a record carrier made of paper.
  • the alignment device 10 has an in Figure 1 shown approximately in the middle of the transport device 14, seen in the transport direction 16 of the sheet 12 of the transport device 14 arranged feed device 18 and one in the transport direction 16 to the transport device 14 subsequent conveyor device 20. Furthermore is the alignment device 10 with a total of four light barriers 22, 24, 26 and 28.
  • the first light barrier 22 is seen directly in the transport direction 16 arranged in front of the feed device 18 and gives to the Control (not shown) of the alignment device 10 Signal off as soon as the sheet 12 in the alignment device 10th is inserted.
  • the second and third light barriers 24 and 26 are arranged in the immediate vicinity of the transport device 14.
  • the second light barrier 24 is in the transport direction 16 positioned in front of the transport device 14 and detects the sheet 12 as soon as it is the transport device 14th is fed.
  • the third light barrier 26 is in the transport direction 16 seen after the transport device 14 arranged and is used to determine the side edge of the sheet 12, as soon as the sheet 12 is gripped by the transport device 14 has been.
  • Seen in the transport direction 16 immediately before of the conveyor device 20 is the fourth light barrier 28 attached, which grips the sheet 12 once it is the conveyor 20 is supplied.
  • the transport device 14 uses one in a frame (not shown) mounted transport roller 30, which extends transversely to the transport direction 16 of the sheet 12. Above the transport roller 30, three are also in the Frame-held counter-pressure rollers 32 stored under Bias applied to the transport roller 30 and with this form a transport gap through which the sheet 12 is conveyed becomes. On the right front side of the Transport roller 30, a roller drive 34 is arranged. This Roller drive 34 displaces the transport roller 30 during the Transport of the sheet 12 in rotation, so that by the under Biasing on the transport roller 30 abutting pressure rollers 32 the sheet 12 is promoted.
  • the frame of the transport device 14 is transverse to the transport direction 16 of the sheet 12 extending guide rails (not shown) held. On each face of the frame the transport device 14 is one end of each Leaf spring 36 and 38 attached. The other end of the leaf spring 36 and 38 is fixed to the frame 40 of the alignment device 10 connected. Immediately behind the roller drive 34, an actuator 42 is attached to this, the drive shaft 44 extends in the transport direction 16. The Drive shaft 44 is equipped with a toothing that with one attached to the frame 40 of the alignment device 10, rack extending transversely to the transport direction 16 46 is engaged.
  • the actuator 42 by the controller (not shown) of the alignment device 10 activated by the interaction of the drive shaft 44 with the rack 46, the transport device 14 along the Guides against the force of the leaf springs 36 and 38 across Transport direction 16 moves. If the actuator 42 is deactivated, the transport device 14 moves through the Effect of leaf springs 36 and 38 back in their Starting position.
  • the feed device 18 uses a transverse to the transport direction 16 extending feed roller 48 which in one Frame (not shown) is rotatably mounted. Above the Feed roller 48 is arranged a counter pressure roller 50. The The platen roller 50 is at one end thereof pivotable plate 52 and 54 rotatably mounted. The swiveling Plates 52 and 54 are on a common axis A. attached, which in turn on the frame (not shown) is rotatably mounted. On each plate 52 and 54 is also a coil spring 56 or 58 pushed onto the axis A.
  • the conveyor 20 also uses a cross to the direction of transport 16 extending conveyor roller 64 on the under Prestress three back pressure rollers 66.
  • the conveyor roller 64 is 68 in by means of a conveyor roller drive Rotation offset, so that between the conveyor roller 64 and arranged the counter pressure rollers 66 arranged sheet 12 becomes.
  • the controller stops the feeder 18 until the fourth light barrier 28 has detected that the further sheet has left the alignment device 10.
  • the control deactivates the roller drive 34 and moves with it With the help of the actuator 42, the transport device 14 back to their starting position, i.e. approximately in the middle of the transport track.
  • the controller then activates the feed device again 18, so that the sheet 12 to be aligned further in the alignment device 10 is retracted.
  • the feeder 18 not stopped, but pulls the sheet 12 without Interruption in the alignment device 10.
  • the sheet 12 to be aligned is placed in the transport device 14 arrives, its front edge slides into the transport gap between transport roller 30 and counter-pressure roller 32. It forms the one shown in dash-dotted line Line of contact between the transport roller 30 and the this adjacent pressure rollers 32 a stop on which the front edge of the sheet 12 aligns. Because the feeder 18 still the sheet 12 in the alignment device 10 promotes, the sheet 12 bulges between the Feed device 18 and transport device 14, as in Figure 1 shown. After a specified period, the Control of the alignment device 10, the feed device 18 so that the sheet is held by the feeder 18 is and at the same time due to the bulge caused tension in sheet 12 with its leading edge aligns the line of contact.
  • the controller holds the transport device 14 on.
  • the control then actuates the control elements 60 of the feed device 18, whereby the counter-pressure roller 50 from their transport position in which they are under tension the feed roller 48 is in the open operating position is moved in which it is kept at a distance from the feed roller 48 is.
  • the feed device 18 the sheet 12 free, which relaxes and flat again runs along the transport direction 16.
  • the transport device 14 begins the alignment process, which is explained in more detail below with reference to FIG. 2 becomes.
  • FIG. 1 shows a path-time diagram and a current-time diagram below this.
  • the path-time diagram shows the alignment process of the sheet 12 in a top view, the different positions of the sheet 12 being shown in dotted, dashed or solid lines.
  • the setpoint pressure position which is labeled X D on the path axis, runs in a dashed line.
  • the value X 0 on the axis defines the starting position of the sheet 12 when it is drawn into the alignment device 10.
  • the value X L defines a predetermined distance of the third light barrier 26 from the target pressure position, which should be 6 mm in this exemplary embodiment.
  • the current-time diagram shows the signal curve 70 of the light barrier 26 and the signal curve 72 of the actuator 42, with which the transport device 14 is moved transversely to the transport direction 16.
  • the sheet previously aligned by the alignment device 10 has left the transport device 14. Since the light barrier 26 is no longer interrupted, it generates a signal (shown hatched).
  • the light barrier 26 informs the controller that the sheet has left the transport device 14, the.
  • Actuator 42 activated, as shown in the waveform 72; whereby the transport device 14 is moved back to its original position. The return movement of the transport device 14 is completed at time t 2 .
  • the third light barrier 26 detects the sheet 12 to be realigned, which is drawn into the transport device 14 with an initial position X 0 .
  • the third light barrier 26 is interrupted, which can be seen in the signal curve 70.
  • the control detects the signal from the third light barrier 26 at time t 3 , it moves the feed device 18 into the open position, which releases the sheet 12, and then activates the actuator 42, which transversely transversely aligns the entire transport device 14 and thus also the sheet 12 to be aligned moved to the transport direction 16 to the left.
  • the sheet 12 has been moved to the left so far that its position corresponds to the position X L of the third light barrier 26, this is no longer interrupted by the sheet 12 and generates a signal, as shown in the signal curve 70.
  • the control system recognizes that the sheet 12 is at the level of the third light barrier 26 and stops the actuator drive second drive 42.
  • the control activates the actuator 42 in such a way that it moves the transport device 14 and thus the sheet 12 to the right transversely to the transport direction.
  • the actuator 42 is operated by the control at a constant speed over a predetermined period of time. After this period of time at time t 6 , the control stops the actuator 42, so that the transport device 14 and thus the sheet 12 remain in a certain position transverse to the transport direction 16. Since the actuator 42 had been activated at a constant speed for a predetermined period of time, the blade 12 was moved to the right a predetermined distance.
  • This path section corresponds to the distance between the third light barrier 26 and the target pressure position X D , so that the sheet 12 is at the level of the target pressure position X D with the right side edge from time t 6 .
  • the control activates the roller drive 34 of the transport device 14 and the conveyor roller drive 68 of the conveyor 20. This will remove the sheet 12 from the alignment device 10 transported.
  • the deactivated Control the adjusting elements 60 of the feed device 18, whereby the platen roller 50 by the force of the coil springs 56 and 58 is moved back to its transport position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Registering Or Overturning Sheets (AREA)

Abstract

L'invention concerne un dispositif d'alignement (10), pour aligner une feuille (12) individuelle. Ce dispositif d'alignement (10) comporte un dispositif de détection (22, 24, 26, 28), un dispositif d'alimentation (18), ainsi qu'un dispositif de transport (14) monté en aval du précédent, dans le sens de transport de la feuille (12). Pour aligner la feuille (12), le dispositif de détection (22, 24, 26, 28) détecte l'arête latérale de la feuille afin de déterminer sa position par rapport à une position d'impression théorique. Ensuite, le dispositif de transport (14) qui porte la feuille (12) est déplacé par rapport au sens de transport (16) de ladite feuille (12) afin que cette dernière soit déplacée en position d'impression théorique. Avant l'alignement de la feuille (12), le dispositif d'alimentation (18) qui achemine la feuille (12) jusqu'au dispositif de transport (14) est ouvert.

Claims (15)

  1. Dispositif d'alignement, en particulier pour un copieur ou un appareil d'impression feuille à feuille, pour aligner une feuille individuelle (12) d'un support d'information, comportant
    un dispositif à capteurs (22, 24, 26, 28) qui détecte le bord latéral de la feuille (12) pour déterminer sa position (x0) par rapport à une position d'impression théorique (xD),
    un dispositif de défilement (14), déplaçable transversalement par rapport à la direction de défilement de la feuille (12), à l'aide duquel la feuille (12), maintenue par celui-ci, peut être alignée dans la position d'impression théorique (xD) en fonction de la position déterminée (x0), et qui comporte deux unités de défilement (30, 32) agencées l'une en face de l'autre et en contact l'une avec l'autre sur une ligne de contact s'étendant transversalement à la direction de défilement (16), la ligne de contact formant une butée pour le bord avant du support d'information (12), et
    un dispositif d'amenée (18), amenant la feuille (12) au dispositif de défilement (14), qui déplace la feuille (12) dans la position de défilement avant la détection par les unités de défilement (30, 32) jusqu'à ce que la feuille (12) se gondole entre le dispositif d'amenée (18) et le dispositif de défilement (14) et s'aligne sur la ligne de contact,
       caractérisé en ce que le dispositif d'amenée (18) est réglable de la position de défilement dans une position opérante ouverte dans laquelle il libère la feuille (12) après la détection par le dispositif de défilement (14).
  2. Dispositif d'alignement selon la revendication 1, caractérisé en ce que le dispositif d'amenée (18) comporte deux unités de déplacement (48, 50) s'étendant transversalement à la direction de défilement de la feuille (12), et en ce que l'une au moins des unités de déplacement (48) est mobile entre une position de défilement dans laquelle elle touche l'autre unité de déplacement (50) et une position opérante ouverte dans laquelle elle est maintenue à distance de l'autre unité de déplacement (50).
  3. Dispositif d'alignement selon la revendication 2, caractérisé en ce que, au niveau dispositif d'amenée (18), il est prévu au moins un élément tendeur (52, 54) qui précontraint l'unité de déplacement mobile (48) dans la position de défilement, et au moins une unité de réglage (60) déplaçant l'unité de déplacement mobile (48) pour l'amener dans la position opérante ouverte en s'opposant à la force exercée par l'élément de tension (52, 54).
  4. Dispositif d'alignement selon la revendication 1, 2 ou 3, caractérisé en ce qu'un dispositif tendeur (36, 38) maintient le dispositif de défilement (14) avant d'aligner la feuille (12) dans une position de départ transversalement à la direction de défilement (16), et en ce que, lors de l'alignement de la feuille (12), le dispositif de défilement (14) est déplacé en s'opposant à la force exercée par le dispositif tendeur (36, 38).
  5. Dispositif d'alignement selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif à capteurs comporte un premier capteur de bord (24), agencé en amont du dispositif de défilement (14) par référence au sens de défilement (16), qui détecte le bord latéral de la feuille (12) et détermine la position (x0) de celle-ci par rapport à la position d'impression théorique (XD) au début de l'alignement de la feuille (12).
  6. Dispositif d'alignement selon l'une des revendications 1 à 5, caractérisé en ce que le dispositif à capteurs comporte un second capteur (26) agencé en aval du dispositif de défilement (14) par référence au sens de défilement (16).
  7. Dispositif d'alignement selon la revendication 5 ou 6, caractérisé en ce qu'il est utilisé une barrette lumineuse ou une structure photosensible comme premier capteur de bord (24) et/ou comme second capteur de bord (26).
  8. Dispositif d'alignement selon la revendication 7, caractérisé en ce que la structure photosensible est un réseau d'éléments photosensibles à transfert de charges (CCD).
  9. Dispositif d'alignement selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un dispositif de déplacement (20) est agencé en aval du dispositif de défilement (14) par référence au sens de défilement (16).
  10. Dispositif d'alignement selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de défilement (14) est déplacé au moyen d'un premier dispositif d'entraínement (36) transversalement à la direction de défilement (16) du support d'information (12).
  11. Dispositif d'alignement selon l'une quelconque des revendications précédentes, caractérisé en ce que la première unité de défilement est un rouleau de défilement (30) s'étendant transversalement à la direction de défilement (16), et en ce que la seconde unité de défilement est au moins un rouleau antagoniste (32) portant contre le rouleau de défilement (30) avec une précontrainte, la ligne de contact entre les deux rouleaux (30, 32) formant, au début de l'alignement, la butée destinée au bord avant de la feuille (12).
  12. Dispositif d'alignement selon la revendication 11, caractérisée en ce que le rouleau de défilement (30) est entraíné par un second dispositif d'entraínement (34).
  13. Dispositif d'alignement selon la revendication 11 ou 12, caractérisé en ce que les rouleaux (30, 32) sont maintenus dans leur position de départ au moyen du dispositif tendeur (36, 38), et en ce que les rouleaux (30, 32) sont déplaçables transversalement à la direction de défilement (16) en s'opposant à la force exercée par le dispositif tendeur (36, 38).
  14. Dispositif d'alignement selon la revendication 13, caractérisé en ce que le dispositif tendeur comporte deux ressorts à lames (36, 38) agencés parallèlement l'un à l'autre, et respectivement au voisinage de chacune des extrémités opposées du rouleau de défilement (30) du dispositif de défilement (14).
  15. Dispositif d'alignement selon la revendication 10 ou 12, caractérisé en ce que le premier et/ou le second dispositifs d'entraínement (36, 34) sont chacun un dispositif d'entraínement asservi ou bien un moteur pas-à-pas.
EP97945780A 1996-10-22 1997-10-22 Dispositif d'alignement Expired - Lifetime EP1008016B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19643626 1996-10-22
DE19643626 1996-10-22
PCT/DE1997/002459 WO1998018053A1 (fr) 1996-10-22 1997-10-22 Dispositif d'alignement

Publications (2)

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EP1008016A1 EP1008016A1 (fr) 2000-06-14
EP1008016B1 true EP1008016B1 (fr) 2002-01-09

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EP97945780A Expired - Lifetime EP1008016B1 (fr) 1996-10-22 1997-10-22 Dispositif d'alignement

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EP (1) EP1008016B1 (fr)
DE (2) DE59706144D1 (fr)
WO (1) WO1998018053A1 (fr)

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EP3904250A1 (fr) 2020-04-30 2021-11-03 Koenig & Bauer AG Dispositif et procédé d'alimentation de produits plans à une unité de traitement
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DE102018126049B4 (de) * 2018-10-19 2020-08-27 Koenig & Bauer Ag Tafelförmiges Substrat verarbeitende Maschine mit einer Anlage, Verfahren zum Einrichten und Verfahren zum Betreiben einer Anlage
EP3904250A1 (fr) 2020-04-30 2021-11-03 Koenig & Bauer AG Dispositif et procédé d'alimentation de produits plans à une unité de traitement
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DE102021105082A1 (de) 2021-03-03 2022-09-08 Koenig & Bauer Ag Vorrichtung und Verfahren zum Zuführen von flächenförmigen Gütern zu einer Bearbeitungseinheit
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Publication number Publication date
DE19781181D2 (de) 1999-12-23
US6135446A (en) 2000-10-24
EP1008016A1 (fr) 2000-06-14
WO1998018053A1 (fr) 1998-04-30
DE59706144D1 (de) 2002-02-28

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